Email Address Not Automatically Created when Creating Excahnge Users

I'm running mixed windows 2000 and win2k3 servers as my domain controllers. I also running mixed exchange 2000 and exchange 2k3 servers. All server OS are standard edition while all exchange servers are enterprise edition. All servers are divided to two sites with permanent 4MB leased line. dc01,dc02, dc03 and exch03 (back end-exch2k) are at site A while dc04, exch01 (frontend-exch2k3) and exch02 (backend-exch2k3) are at site B. All are running in single domain and both site was configured in th Active Directory Site and Services.

I'm facing this scenario
1. There is no problem when creating windows user, all newly created user are propagate to all domain controllers
2. When creating exchange users, the newly created users are not automatically propagate with the E-mail address (General tab and E-mail Addresses tab (proxy addresses)). So I have to create it manually
3. The Mailbox Store Location at the Exchange General tab is propagated, but when I check at the Exchange Advanced tab under Mailbox Rights, there is only SELF in the group or user names box. I have to move the mailbox to different mailbox store to 'activate' the user mailbox ( Only after move the mailbox, I can see others (default) entries in the group or user names box)

I think so, I went through all the articles, the only errors were related to unable to generate 3rd party (XFAX)proxyaddress which is no longer in used. The article options is to copy the .dll file and paste it to the spesific directory (by recreating back the directory) or to disable the 3rd party proxy address at the recipient policy. I did it but still not working

I just realised the stamping email address works today after I click the 'update the policy now' at the default recipent policies. Now the only thing is, I still got the event id 2027, 2037 and 8231even though I was disable it.

Yes, I already read the article. The email address stamping was OK now . As I mentioned, the event idsrelated to 3'rd party proxy address still generated even though I was disable it at recipient policy. Is there anything to do at the registry?
(Event Id 2027) Unable to generate the e-mail address. Unable to load address module 'E:\program files\exchsrvr\address\XFAX\i386\proxygen.dll' for address type 'XFAX'. Error 0x007007e]

(Event Id 2037) The file version of '\address\XFAX\i386\proxygen.dll' installed on the local serveris not current. Unable to locate a correct version of any server in the site.

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